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3 years ago

Hi, I have a problem with homework can anyone help me, please? f(x) =x3·ln (2x) + 7 sin(7)

Mathematics

1 answer:

dsp733 years ago

4 0

2(3x)+7sin(7)

=6x+7sin(7)

this is all i could do

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HELP

ladessa [460]

Use the Pythagorean Theorem:
A²+B²=C²
6²+5²=C²
36+25=C²
61=C²
√61=C
So the answer is C.

7 0

3 years ago

Read 2 more answers

Sandra throws an object straight up into the air with initial velocity of 38 ft per square from platform that is 30 ft above the

expeople1 [14]

Answer:

3 seconds.

Step-by-step explanation:

We have been given that Sandra throws an object straight up into the air with initial velocity of 38 ft per second from platform that is 30 ft above the ground.

To find the time it will take for object to hit the ground, we will use formula:

$h(t)=-16t^2+v_0t+h_0$ , where, $v_0$ represents initial velocity and $h_0$ represents initial height.

Upon substituting our given initial velocity and initial height, we will get:

$h(t)=-16t^2+38t+30$

We know that object will hit the ground, when height will be 0, so we will equate object's height equal to 0 and solve for t as:

$-16t^2+38t+30=0$

Divide by 2:

$-8t^2+19t+15=0$

Upon using quadratic formula, we will get:

$t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-19\pm\sqrt{19^2-4(-8)(15)}}{2(-8)}$

$t=\frac{-19\pm\sqrt{361+480}}{-16}=\frac{-19\pm\sqrt{841}}{-16}$

$t=\frac{-19\pm29}{-16}$

$t=\frac{-19-29}{-16},t=\frac{-19+29}{-16}$

$t=\frac{-48}{-16},t=\frac{10}{-16}$

$t=3,t=-\frac{5}{8}$

Since time cannot be negative, therefore, it will take 3 seconds for object to hit the ground.

7 0

3 years ago

Help me solve on number 5 and 6 (solve for x)

Lena [83]

Answer:

5.) 39

6.) 52

Step-by-step explanation:

5.) 90-51= 39

6.) 74 + 34= 108

180-108= 72

56+72= 128

180-128= 52

x=52

5 0

3 years ago

suppose that you pay a dollar to roll two dice if you roll some eight or nine you get a dollar back plus a dollar fifty if not y

never [62]

A little confused by the question

6 0

3 years ago

The slope, m, of a linear equation can be found using the formula m = , where the x- and y-values come from two ordered pairs,

Westkost [7]

The formula is y=mx + b, or rearranged would be m= y/x -b/x.

7 0

4 years ago